Investigating Quantum States and Dynamics with X-ray Spectromicroscopy

Register Here:
https://harvard.zoom.us/webinar/register/WN_q8rI_YJWS2GiLNyxVADNKA

X-ray spectroscopies can reveal the momentum and energy distribution of quantum states inside materials, and provide a foundational understanding of emergent quasiparticles and quantum topology.  The last decade has seen the initial roll-out of a new generation of X-ray light sources with greatly enhanced photon coherence.  I will talk about the profound implications this is beginning to have for our understanding of quantum materials and devices, by enabling powerful spectroscopies to be performed in microscopic imaging modes, with micron-to-nanometer scale spatial resolution.  The presentation will highlight new experimental observables found in recent photoemission measurements by my group on the topological insulator Bi2Se3, the topological Kondo insulator SmB6, and the topological superconductor UTe2.  I will also discuss the dramatically new data science paradigms required for handling microscopically-resolved data sets, which can be sparse and up to 6-dimensional! [position (2D) x momentum (3D) x energy (1D)]